sdk-v3: Remove lambda in v2 as it is not used

motdotlaGH-641

Author: abetomo

lib/main.js

@@ -970,21 +970,18 @@ they may not work as expected in the Lambda environment.
       console.log(`=> Uploading zip file to AWS Lambda ${region} with parameters:`)
     }
     console.log(params)
-    // Migrating to v3.
-    const lambda = new aws.sdk.Lambda({
-      region,
-      apiVersion: '2015-03-31'
-    })
     const lambdaClient = new LambdaClient({ region })
+    // Migrating to v3.
+    // todo: `aws.sdk` is v2, so replace it with v3.
     const scheduleEvents = new ScheduleEvents(aws.sdk, region)
     const s3Events = new S3Events(aws.sdk, region)
     const cloudWatchLogs = new CloudWatchLogs(aws.sdk, region)
 
     const existsFunction = await (async () => {
       try {
-        await lambda.getFunction({
+        await lambdaClient.send(new GetFunctionCommand({
           FunctionName: params.FunctionName
-        }).promise()
+        }))
         return true
       } catch (err) {
         if (!this._isFunctionDoesNotExist(err)) {
@@ -995,10 +992,10 @@ they may not work as expected in the Lambda environment.
     })()
 
     if (existsFunction) {
-      const existingEventSourceList = await this._listEventSourceMappings(lambda, {
+      const existingEventSourceList = await this._listEventSourceMappings(lambdaClient, {
         FunctionName: params.FunctionName
       })
-      const results = await this._uploadExisting(lambda, params)
+      const results = await this._uploadExisting(lambdaClient, params)
       console.log('=> Done uploading. Results follow: ')
       console.log(results)
 
@@ -1015,12 +1012,12 @@ they may not work as expected in the Lambda environment.
             eventSourceList.S3Events
           ),
           this._updateTags(
-            lambda,
+            lambdaClient,
             results.FunctionArn,
             params.Tags)
         ]),
         this._updateEventSources(
-          lambda,
+          lambdaClient,
           params.FunctionName,
           existingEventSourceList,
           eventSourceList.EventSourceMappings
@@ -1032,13 +1029,13 @@ they may not work as expected in the Lambda environment.
         )
       ])
     } else {
-      const results = await this._uploadNew(lambda, params)
+      const results = await this._uploadNew(lambdaClient, params)
       console.log('=> Done uploading. Results follow: ')
       console.log(results)
 
       return Promise.all([
         this._updateEventSources(
-          lambda,
+          lambdaClient,
           params.FunctionName,
           [],
           eventSourceList.EventSourceMappings